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What is the default data format for external uvc -usb Camera data - yuv420 or yuv422?

What is the default data format received from an external camera compatible with uvc-usb. Is it yuv420 or yuv422 , or it depends on the camera sensor. one item to documents related to the algorithm for converting one format to another. Rgds, Softy

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The USB Video Class supports one packaged YUV 4: 2: 2 format (YUY2) and one flat 4: 2: 0 YUV format (NV12). ( http://www.usb.org/developers/devclass_docs/USB_Video_Class_1_1_090711.zip ). The default values ​​are implementation dependent (it can also give you an MPEG2 or h264 stream).

, :

YUV422 2 (Y), (U V): YUYV YUYV YUYV YUYV YUYV YUYV

YUV420 , Y, U, V. U V- ( ) U ( V) , .

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